Which of the following is an effect of norepinephrine binding to beta 2 adrenergic receptors?

vasodilation
vasoconstriction
an increase in heart rate
lipolysis

How are the reproductive cycles of a fungus and a pteridophyte similar? a)both organisms form fruiting bodies that produce diploid seeds. b)both organisms produce haploid spores and exhibit diploid and haploid stages. c)both organisms reproduce sexually when two haploid hyphae fuse. d)both organisms exhibit a diploid stage and are only able to reproduce asexually.

Which worm has eyespots that are used to detect light? a fluke b marine worm c planarian d tapeworm

26 a medida que cambia el clima, ¿qué tipo de reproducción más probablemente de a una especie mayores posibilidades de supervivencia?